Polymorphism in cyclohexanol: A Raman spectroscopic study

Abstract Raman spectra of the liquid and three solid phases of cyclohexanol are reported. Disorder in Phase 1 is shown to arise from random mixing of axial and equatorial conformers with free molecule rotation being unimportant. Axial to equatorial transformation is also shown to be unlikely in the solid phase. The equatorial isomer is shown to dominate the structures of phases II and III with phase III showing, in addition, intermolecular hydrogen bonding. The dominant mechanism for dielectric loss in the plastic phase is hydroxyl group rotation with molecule libration playing a minor rôle.

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